A database has a Managers table and an Employees table. The Employees table references the Managers table using a Foreign Key. The database is set to ON DELETE CASCADE. (a) Explain what ON DELETE CASCADE means in simple English. (b) If you delete one Manager from the database, what will automatically happen to all Emgim2. (b) If you delete one Manager from the database, what will automatically happen to all Employees under that manager? (c) Explain why this is very dangerous in a real banking system. What is the best practice and how does it fix this danger?